He did not manage to break par in any of his three rounds in the $30,000 Laguna National-SPGA Committee Cup at the daunting par-72 Laguna National's World Classic Course.
But a three-day total of one-over 217 (72-73-72) was enough for Lam Chih Bing to clinch a five-shot victory over compatriots Mardan Mamat (72) and Koh Dengshan (77) yesterday.
The turning point of the final round came at the par-four 320-yard fifth hole.
At that point, the 38-year-old Lam was level with joint-leader Koh after four holes.
Lam then pulled off a spectacular chip-in eagle to break free from the 28-year-old Koh, who made a double-bogey to complete a four-shot swing.
The big-hitting Lam never relinquished the lead, playing it safe on the back nine for an even-par 72 and a comfortable five-shot victory.
"I just played pretty steady all day," said Lam, before he flew off to Pattaya, Thailand, to take part in the Singha Pattaya Open - an ASEAN PGA Tour event - starting today.
"My eagle at the fifth hole, where I chipped in, was the turning point after Dengshan made double-bogey at the same hole.
"All of a sudden, I had a four-shot lead, which I managed to increase to seven shots after the front nine which gave me the luxury to play conservatively on such a tough course where big numbers are lurking. "I'm just coming back from having problems with my swing. I'm less than 100 per cent, but I'm happy with my recent results, which include this win and two cuts made on the Asian Development Tour."
Singapore's top-ranked golfer Mardan matched Lam's score of 72 in the final round, but he was five strokes adrift at the start of the day after a five-over 77 on Tuesday and finished second by the same margin.
Quincy Quek was also left to rue a poor second round of 11-over 83, as he was the only golfer to post a red number yesterday with an impressive four-under 68.
He finished fourth, six strokes behind Lam with a seven-over total of 223.
In the seniors' division, Poh Eng Wah's final round of 74 was enough for him to beat second-round leader Jimmy Poh (76) by one stroke with a 13-over total of 229.
India's Samarth Dwivedi enjoyed a whopping 24-stroke victory over Oscar in the amateurs' section. He shot a 75 for a 230 total.
As a mark of respect for Singapore's first Prime Minister Mr Lee Kuan Yew, who died on Monday, all golfers wore black ribbons on their caps and observed a minute of silence at the prize ceremony.